The Temple of the Tooth in Kandy, Sri Lanka, houses the best known of several supposed relics of Buddha. According to legend, the tooth (a left canine) was taken from the Buddha's funeral pyre in 543BC and wars have been fought over the right to possess it and rule the island.

Three times a year - on September 19, December 16 and the first Sunday in May - this relic, apparently the blood of San Gennaro, is presented to local residents and pilgrims at Naples Cathedral. Pope Francis venerated the relic during a visit to the city in March 2015.

6. The hand of Saint Teresa de Avila, Ronda
The incorruptible left hand of Saint Teresa de Avila, which was seized by Francisco Franco in the 1930s, who kept it by his bedside until his death, is now found at the Iglesia de Nuestra Señora de la Merced in the Andalusian town of Ronda.

7. Relic of the Holy Blood, Bruges
Colin Farrell, star of In Bruges, was thoroughly unimpressed with this relic during his visit. It is believed by some to be the blood of Christ, taken by Joseph of Arimathea, and is found in the Basilica of the Holy Blood.